EP0715169A1 - Mesure d'une caractéristique d'un gaz - Google Patents

Mesure d'une caractéristique d'un gaz Download PDF

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Publication number
EP0715169A1
EP0715169A1 EP95308501A EP95308501A EP0715169A1 EP 0715169 A1 EP0715169 A1 EP 0715169A1 EP 95308501 A EP95308501 A EP 95308501A EP 95308501 A EP95308501 A EP 95308501A EP 0715169 A1 EP0715169 A1 EP 0715169A1
Authority
EP
European Patent Office
Prior art keywords
gas
value
property
pressure
sample
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95308501A
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German (de)
English (en)
Other versions
EP0715169B1 (fr
Inventor
Paul S. Hammond
Robert R. Thurston
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lattice Intellectual Property Ltd
Original Assignee
BG PLC
British Gas PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BG PLC, British Gas PLC filed Critical BG PLC
Publication of EP0715169A1 publication Critical patent/EP0715169A1/fr
Application granted granted Critical
Publication of EP0715169B1 publication Critical patent/EP0715169B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/22—Fuels; Explosives
    • G01N33/225—Gaseous fuels, e.g. natural gas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02881—Temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/1842—Ambient condition change responsive
    • Y10T137/1939—Atmospheric
    • Y10T137/1963—Temperature

Definitions

  • This invention relates to a method of measuring a gas characteristic and also to apparatus for making the measurement.
  • the gas characteristic(s) concerned is/are the calorific value and/or the Wobbe index of a fuel gas.
  • An object of the invention is to provide a means of measuring the calorific value and/or the Wobbe index of a fuel gas by physical examination of a sample of the gas from a supply of the gas, which means of measuring does not destroy the sample which may thereafter be used as useful fuel and obviates any need for and the expense of providing a venting arrangement for products of combustion because making the measurement(s) does not require combustion of the sample.
  • a method of measuring the calorific value and/or the Wobbe index of a fuel gas characterised by taking a fuel gas sample from a supply of said fuel gas and raising a predetermined volume of said sample gas to a predetermined pressure, returning said sample to the supply, making measurement of at least one of a value of the property of density or of the property of viscosity of said gas forming the sample using data obtained during the course of said return and deriving the calorific value and/or the Wobbe index by using said measured value of the density and/or of the viscosity.
  • an apparatus for measuring the calorific value and/or the Wobbe index of a fuel gas characterised by an enclosure having a predetermined volume therewithin, pump means to deliver a sample of said fuel gas from a supply into said enclosure, delivery stopping means for stopping delivery of said gas into the enclosure when the gas therein of said predetermined volume reaches substantially a predetermined pressure, return conduit means for returning the sample gas from said enclosure to said supply, measuring means for measuring at least one of the value of the property of density or of the property of viscosity of the gas as it flows along said conduit means, and said measuring means comprising at least a part thereof disposed in said conduit means for use in the measuring of at least one of the value of said property of density or of said property of viscosity.
  • a pipe 2 carries a supply of a fuel gas which may be at any desired pressure.
  • Arrow A indicates the direction of gas flow.
  • the fuel gas may be natural gas.
  • the gas pressure may be a relatively low pressure, for example the relatively low pressure at which fuel gas is piped into industrial or domestic consumers' premises.
  • the apparatus 4 comprises an enclosure or chamber 6 of a fixed known volume connected by an inlet conduit 8 with the supply pipe 2. Leading from chamber 6 is an outlet conduit arrangement 10 comprising outlet conduits 12 and 14 merging into a conduit 16 opening into the supply pipe downstream of conduit 8.
  • Conduit 8 comprises a pump 18 and a shutoff valve 20.
  • the pump 18 may be powered by any suitable means.
  • An electronic control 22 comprising computer means 24 is connected by signal path 26 to a driver 28 connected to the pump 18 to operate or stop the latter according to instructions from the control.
  • the valve 20 has a pilot control connected by a bleed path 30 with the supply pipe 2. Normally the valve 20 is open, but is so arranged that it is closed, by operation of the pilot control, for as long as gas pressure within the chamber 6 is substantially at a predetermined pressure difference PD greater than the gas pressure in the pipe 2.
  • Outlet conduit 12 comprises a shutoff valve 32 and a gas density measuring aid 34 in the form of a flow rate device, for example an orifice plate
  • outlet conduit 14 comprises a shutoff valve 36 and a gas viscosity measuring aid 38 in the form of a gas flow resistance device, for example a capillary passage or tube.
  • Each valve 32 or 34 can be opened and closed by operation of a respective driver 40 or 42 in response to signals from the control 22.
  • the chamber 6 includes a gas pressure sensor 44 supplying pressure information to the control 22. If it is desired to measure the speed of sound in gas within the chamber 6, the chamber can have an audible sound or ultrasound emitter 46 operated by control 22 and a receiver 48 sending sound received signals to the control, or the receiver 48 may be omitted and the device 46 may be an emitter/receiver to detect the sound signals reflected back thereto from the chamber wall facing the emitter/receiver. If it is desired to measure the thermal conductivity of gas in the chamber 6 and/or the specific heat capacity of that gas, the chamber can include temperature sensors 50 and 52 supplying temperature information to the control 22 and a heater 54 operated in response to signals from the control. A further gas pressure sensor 56 may be provided in the pipe 2 to observe the pressure of the gas supply therein and send pressure information to the control.
  • the control 22 causes valves 32 and 36 to close and the pump 18 to operate thereby extracting a sample of fuel gas from the pipe 2 and pumping it into the chamber 6 until the gas pressure of the gas sample therein reaches the predetermined pressure difference PD above that of the gas in supply pipe 2, whereupon the valve 20 closes automatically and sends a signal in line 58 to the control 22 which then issues a signal to driver 60 to lock the valve 20 closed.
  • control 22 can make measurement of the value of the velocity of sound in the gas in the chamber 6, and/or of the value of its thermal conductivity and/or the value of its specific heat capacity, and making calculation corrects those measurements to what the values of velocity of sound, and/or thermal conductivity and/or specific heat capacity are at standard temperature and pressure and memorises those corrected values. Then the control 22 causes the valve 32 to open and the sample of gas under the pressure difference between that in the chamber 6 and pipe 2 returns to the pipe through conduits 12 and 16 and thus through the gas density measuring aid 34 (for example an orifice plate). The rate of gas flow through the aid 34 is a function of gas density and this is calculated by the control 22 and corrected to standard temperature and pressure and memorised in the control.
  • the control 22 causes the valve 32 to open and the sample of gas under the pressure difference between that in the chamber 6 and pipe 2 returns to the pipe through conduits 12 and 16 and thus through the gas density measuring aid 34 (for example an orifice plate).
  • the rate of gas flow through the aid 34 is a function of gas density and
  • the control 22 may measure the value of the rate of decay of the gas pressure in the chamber 6 of fixed volume, and from that decay rate value calculate the value of the gas density). Now the control 22 causes the valve 32 to close and the driver 60 to unlock the valve 20 so that it automatically opens thereby allowing a further sample of gas to be pumped into the chamber 6 until the valve 20 automatically closes again on the pressure in the chamber attaining the predetermined pressure difference PD above the pressure in pipe 2.
  • the signal on line 58 again causes the control 22 to operate the driver 60 to lock the valve 20 closed and the control also operates the driver 28 to stop the pump 18.
  • the control 22 operates the driver 42 which opens valve 36 and allows the gas sample to pass from the chamber 6 back to the pipe 2 through conduits 14 and 16.
  • the gas passes through the gas viscosity measuring aid 38 (for example a capillary passage or tube).
  • the control 22 observes the decay, which is a function of the gas viscosity, of the gas pressure in the chamber 6 and fits the observed substantially exponential form of the decay against data stored in the control 22 to give a value for the gas viscosity corrected to standard temperature and pressure. That value is memorised in the control.
  • the control 22 operates the drivers 40 and 60 to open the valve 32 and unlock the valve 20 so it can open automatically.
  • Stored in the control 22 are different sets of predetermined reference data for a given fuel gas, each set of data comprising a gas density value, a gas viscosity value, a speed of sound in gas value, and/or a gas thermal conductivity value and/or a gas specific heat capacity value all corrected to standard temperature and pressure, and each set correlated to a particular calorific value and/or Wobbe index.
  • the measured values of the gas density, viscosity, and/or speed of sound, and/or thermal conductivity and/or specific heat capacity obtained by the apparatus 4 are fitted by the control 22 against the reference sets until a reference set is discovered having values corresponding the most closely to the measured values.
  • the inference is drawn by the control 22 that the calorific value and/or Wobbe index correlated to that reference set are/is the calorific value and/or Wobbe index of the fuel gas in the pipe 2, and the control 22 sends a signal on path 62 conveying the inferred calorific value and/or Wobbe index which may be sent to some remote location and/or may be visually represented by means of appropriate apparatus 64, for example printer means and/or visual display unit means.
  • the signal on path 62 may be sent to a gas volumetric metering means measuring the amount of gas or potential heat energy supplied and/or computing the monetary value of the gas supplied.
  • the bleed path 30 may be omitted and the shutoff valve 20 substituted by another shutoff valve operated wholly in response to signals from the control 22 which, upon receiving signals from the pressure sensors 44 and 56, can observe when the gas pressure in the chamber 6 is the predetermined pressure difference PD above the gas pressure in the supply pipe 2, whereupon the said substitute shutoff valve is closed in response to a signal from the control 22 and held closed until it is opened in response to a signal from the control when it is next desired to charge the chamber 6 with another sample of the gas.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Biochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Regulation And Control Of Combustion (AREA)
EP95308501A 1994-12-02 1995-11-27 Mesure d'une caractéristique d'un gaz Expired - Lifetime EP0715169B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9424430A GB9424430D0 (en) 1994-12-02 1994-12-02 Measurement of a gas characteristic
GB9424430 1994-12-02

Publications (2)

Publication Number Publication Date
EP0715169A1 true EP0715169A1 (fr) 1996-06-05
EP0715169B1 EP0715169B1 (fr) 2001-10-31

Family

ID=10765371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95308501A Expired - Lifetime EP0715169B1 (fr) 1994-12-02 1995-11-27 Mesure d'une caractéristique d'un gaz

Country Status (9)

Country Link
US (1) US5635626A (fr)
EP (1) EP0715169B1 (fr)
AU (1) AU675757B2 (fr)
CA (1) CA2163499C (fr)
DE (1) DE69523538T2 (fr)
ES (1) ES2167407T3 (fr)
GB (1) GB9424430D0 (fr)
HK (1) HK1015175A1 (fr)
NZ (1) NZ280512A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19736528A1 (de) * 1997-08-22 1999-02-25 Ruhrgas Ag Verfahren zur verbrennungslosen Messung des Brennwertes von Brenngas
GB2333371A (en) * 1998-01-16 1999-07-21 British Gas Plc A method and apparatus for measuring the calorific value of a gas
EP0959354A2 (fr) * 1998-05-20 1999-11-24 N.V. Nederlandse Gasunie Méthode pour la détermination sans combustion de la valeur calorifique d'un gaz carburant
DE10122039A1 (de) * 2001-05-07 2002-11-14 Ruhrgas Ag Verfahren und Vorrichtung zum Bestimmen eines für die Beschaffenheit eines Gases repräsentativen Kennwertes
WO2004008136A1 (fr) * 2002-07-10 2004-01-22 Flowcomp Systemtechnik Gmbh Determination de la nature de gaz combustibles par mesure de la conduction thermique, capacite thermique et la fraction d'oxyde de carbone
EP1411355A1 (fr) * 2002-10-18 2004-04-21 Emerson Electric Co. Procédé et dispositif permettant de déterminer une caractéristique représentative de la nature d'un gaz
CN102768168A (zh) * 2007-09-26 2012-11-07 气体产品与化学公司 含烃混合物碳含量的确定方法
EP2503318A3 (fr) * 2011-03-24 2013-01-23 Azbil Corporation Système de mesure de densité et procédé de mesure de densité
EP3021117A1 (fr) * 2014-11-14 2016-05-18 Mems Ag Procede et dispositif de mesure destines a la determination de tailles specifiques pour la qualite du gaz
EP3182118A1 (fr) * 2015-12-19 2017-06-21 Mems Ag Procede et dispositif de mesure pour la determination de proprietes de gaz a l'aide de correlation
WO2017140451A1 (fr) * 2016-02-18 2017-08-24 Process-Electronic Gmbh Procédé et dispositif pour déterminer la concentration de composants gazeux dans un mélange gazeux
EP3812753A1 (fr) 2019-10-24 2021-04-28 Sensirion AG Détermination de paramètres spécifiques aux gaz à partir d'un transfert de chaleur dans le régime de saut de température

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GB9608265D0 (en) * 1996-04-22 1996-06-26 British Gas Plc Apparatus for measuring a gas value
DE19637520C1 (de) * 1996-09-13 1998-03-12 Heraeus Instr Gmbh Verfahren zum Nullpunktabgleich einer Wärmeleitfähigkeits-Meßzelle zur CO¶2¶-Messung in einem Begasungsbrutschrank
US6058761A (en) * 1998-01-30 2000-05-09 Badger Meter, Inc. Measurement of relative density of combustible gases
EP0967483A2 (fr) * 1998-05-20 1999-12-29 N.V. Nederlandse Gasunie Méthode sans combustion pour la détermination de la valeur calorifique d'un gaz carburant
ATE394658T1 (de) * 1998-06-19 2008-05-15 California Inst Of Techn Spurendetektion von analyten mit hilfe artifizieller olfaktometrie
US5979220A (en) * 1998-06-30 1999-11-09 Siemens Westinghouse Power Corporation In-situ sensors for gas turbines
GB9818388D0 (en) * 1998-08-25 1998-10-21 British Gas Plc Measuring energy consumption
JP3638252B2 (ja) * 1998-09-11 2005-04-13 松下電器産業株式会社 ガス種判別システム
DE19918901C1 (de) * 1999-04-26 2001-05-03 Franz Durst Vorrichtung zur Einstellung des Oxydationsmittel/Brennstoffgemisches in der Zuleitung eines Brenners
AU5930900A (en) * 1999-07-12 2001-01-30 Unit Instruments, Inc. Pressure insensitive gas control system
FR2818746B1 (fr) * 2000-12-26 2003-03-28 Gaz De France Procede et dispositif d'evaluation de l'indice de wobbe d'un gaz combustible
US6539775B2 (en) * 2001-02-13 2003-04-01 Wolfgang H. Driftmeier Method and apparatus for the measurement of the interchangeability of LPG/air mixtures with natural gas
AU2003220065A1 (en) * 2002-03-04 2003-09-22 Cyrano Sciences, Inc. Detection, diagnosis, and monitoring of a medical condition or disease with artificial olfactometry
US9109433B2 (en) 2005-08-01 2015-08-18 Baker Hughes Incorporated Early kick detection in an oil and gas well
US8794062B2 (en) * 2005-08-01 2014-08-05 Baker Hughes Incorporated Early kick detection in an oil and gas well
US7523640B2 (en) * 2005-08-01 2009-04-28 Baker Hughes Incorporated Acoustic fluid analyzer
US7614302B2 (en) * 2005-08-01 2009-11-10 Baker Hughes Incorporated Acoustic fluid analysis method
US9366133B2 (en) 2012-02-21 2016-06-14 Baker Hughes Incorporated Acoustic standoff and mud velocity using a stepped transmitter
JP6379069B2 (ja) * 2015-04-09 2018-08-22 東京瓦斯株式会社 発熱量導出装置および発熱量導出方法
DE102015117468A1 (de) * 2015-10-14 2017-04-20 Endress+Hauser Flowtec Ag Verfahren zum Bestimmen von Eigenschaften eines kohlenwasserstoffhaltigen Gasgemisches und Vorrichtung dafür
US20190120145A1 (en) * 2016-05-23 2019-04-25 Siemens Energy, Inc. Gas turbine having fuel gas monitoring system

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DE2912654A1 (de) * 1978-03-31 1979-10-04 Osaka Gas Co Ltd Vorrichtungen zur messung der brenneigenschaften von gasen sowie zur regelung ihres heizwerts
EP0022493A2 (fr) * 1979-07-17 1981-01-21 Ruhrgas Aktiengesellschaft Procédé et dispositif pour la mesure sans combustion et/ou la régulation de l'amenée de quantités de chaleur aux installations de consommation de gaz
WO1988000693A1 (fr) * 1986-07-14 1988-01-28 Ruhrgas Aktiengesellschaft Procede et dispositif de mesure de proprietes de gaz de combustion
DE4118781A1 (de) * 1991-06-07 1992-12-10 Rmg Messtechnik Gmbh Verfahren und vorrichtung zur verbrennungslosen bestimmung der wobbezahl und/oder des brennwertes eines gases
WO1993008457A1 (fr) * 1991-10-23 1993-04-29 Niagara Mohawk Power Corporation Mesure directe sans combustion de combustible gazeux alimentant des dispositifs de consommation de gaz
US5237852A (en) * 1992-03-23 1993-08-24 Atlantic Richfield Company Measurement of gas properties

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Publication number Priority date Publication date Assignee Title
DE2912654A1 (de) * 1978-03-31 1979-10-04 Osaka Gas Co Ltd Vorrichtungen zur messung der brenneigenschaften von gasen sowie zur regelung ihres heizwerts
EP0022493A2 (fr) * 1979-07-17 1981-01-21 Ruhrgas Aktiengesellschaft Procédé et dispositif pour la mesure sans combustion et/ou la régulation de l'amenée de quantités de chaleur aux installations de consommation de gaz
WO1988000693A1 (fr) * 1986-07-14 1988-01-28 Ruhrgas Aktiengesellschaft Procede et dispositif de mesure de proprietes de gaz de combustion
DE4118781A1 (de) * 1991-06-07 1992-12-10 Rmg Messtechnik Gmbh Verfahren und vorrichtung zur verbrennungslosen bestimmung der wobbezahl und/oder des brennwertes eines gases
WO1993008457A1 (fr) * 1991-10-23 1993-04-29 Niagara Mohawk Power Corporation Mesure directe sans combustion de combustible gazeux alimentant des dispositifs de consommation de gaz
US5237852A (en) * 1992-03-23 1993-08-24 Atlantic Richfield Company Measurement of gas properties

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19736528A1 (de) * 1997-08-22 1999-02-25 Ruhrgas Ag Verfahren zur verbrennungslosen Messung des Brennwertes von Brenngas
GB2333371A (en) * 1998-01-16 1999-07-21 British Gas Plc A method and apparatus for measuring the calorific value of a gas
GB2333371B (en) * 1998-01-16 2002-03-20 British Gas Plc Method and appparatus for measuring the calorific value of a gas
US6442996B1 (en) 1998-01-16 2002-09-03 Lattice Intellectual Property Limited Method and apparatus for measuring the calorific value of a gas
EP0959354A3 (fr) * 1998-05-20 2004-12-15 N.V. Nederlandse Gasunie Méthode pour la détermination sans combustion de la valeur calorifique d'un gaz carburant
EP0959354A2 (fr) * 1998-05-20 1999-11-24 N.V. Nederlandse Gasunie Méthode pour la détermination sans combustion de la valeur calorifique d'un gaz carburant
WO2002090920A2 (fr) * 2001-05-07 2002-11-14 Ruhrgas Aktiengesellschaft Procede et dispositif permettant de determiner une caracteristique representative de la nature d'un gaz
WO2002090920A3 (fr) * 2001-05-07 2003-02-27 Ruhrgas Ag Procede et dispositif permettant de determiner une caracteristique representative de la nature d'un gaz
DE10122039B4 (de) * 2001-05-07 2010-10-07 E.On Ruhrgas Ag Verfahren und Vorrichtung zum Bestimmen des Brennwertes eines Gases
DE10122039A1 (de) * 2001-05-07 2002-11-14 Ruhrgas Ag Verfahren und Vorrichtung zum Bestimmen eines für die Beschaffenheit eines Gases repräsentativen Kennwertes
WO2004008136A1 (fr) * 2002-07-10 2004-01-22 Flowcomp Systemtechnik Gmbh Determination de la nature de gaz combustibles par mesure de la conduction thermique, capacite thermique et la fraction d'oxyde de carbone
DE10231269B4 (de) * 2002-07-10 2013-11-07 Elster Gmbh Bestimmung der Gasbeschaffenheit von Brenngasen durch Messung von Wärmeleitfähigkeit, Wärmekapazität und Kohlendioxidanteil
EP1411355A1 (fr) * 2002-10-18 2004-04-21 Emerson Electric Co. Procédé et dispositif permettant de déterminer une caractéristique représentative de la nature d'un gaz
WO2004036209A1 (fr) * 2002-10-18 2004-04-29 Emerson Electric Co. Caracterisation d'une substance fluide
US7377152B2 (en) 2002-10-18 2008-05-27 Brooks Instrument, Llc Method and device for determining a characteristic value that is representative of the condition of a gas
CN102768168A (zh) * 2007-09-26 2012-11-07 气体产品与化学公司 含烃混合物碳含量的确定方法
CN102768168B (zh) * 2007-09-26 2015-05-06 气体产品与化学公司 含烃混合物碳含量的确定方法
EP2503318A3 (fr) * 2011-03-24 2013-01-23 Azbil Corporation Système de mesure de densité et procédé de mesure de densité
CN105606786B (zh) * 2014-11-14 2019-12-24 Mems股份公司 用于确定燃气品质的特定量值的方法和测量装置
CN105606786A (zh) * 2014-11-14 2016-05-25 Mems股份公司 用于确定燃气品质的特定量值的方法和测量装置
US10101186B2 (en) 2014-11-14 2018-10-16 Mems Ag Method and measuring apparatus for determining specific quantities for gas quality
EP3021117A1 (fr) * 2014-11-14 2016-05-18 Mems Ag Procede et dispositif de mesure destines a la determination de tailles specifiques pour la qualite du gaz
EP3182118A1 (fr) * 2015-12-19 2017-06-21 Mems Ag Procede et dispositif de mesure pour la determination de proprietes de gaz a l'aide de correlation
CN106979991A (zh) * 2015-12-19 2017-07-25 Mems股份公司 通过关联测定气体性质的方法和测量仪器
US10371678B2 (en) 2015-12-19 2019-08-06 Mems Ag Method and measuring apparatus for determining gas properties by correlation
RU2721900C2 (ru) * 2015-12-19 2020-05-25 Мемс Аг Способ и измерительный прибор для определения свойств газа путем корреляции
CN106979991B (zh) * 2015-12-19 2021-07-16 Mems股份公司 通过关联测定气体性质的方法和测量仪器
WO2017140451A1 (fr) * 2016-02-18 2017-08-24 Process-Electronic Gmbh Procédé et dispositif pour déterminer la concentration de composants gazeux dans un mélange gazeux
EP3812753A1 (fr) 2019-10-24 2021-04-28 Sensirion AG Détermination de paramètres spécifiques aux gaz à partir d'un transfert de chaleur dans le régime de saut de température

Also Published As

Publication number Publication date
AU675757B2 (en) 1997-02-13
HK1015175A1 (en) 1999-10-08
DE69523538D1 (de) 2001-12-06
US5635626A (en) 1997-06-03
CA2163499C (fr) 1999-08-10
DE69523538T2 (de) 2002-05-08
GB9424430D0 (en) 1995-01-18
EP0715169B1 (fr) 2001-10-31
CA2163499A1 (fr) 1996-06-03
AU3912695A (en) 1996-06-27
NZ280512A (en) 1997-10-24
ES2167407T3 (es) 2002-05-16

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